Fusing Temperature Control For Thick Paper At The By-Pass Tray; Pre-Heat Mode (Fusing Idling); To Prevent Offset When Making Multiple Copies On Small-Width Paper; Reduced Copy Speed With Narrow Paper - Ricoh K-C1 Service Manual

20 February, 2001

Fusing Temperature Control for Thick Paper at the By-pass Tray

When thick paper mode is selected, the machine changes the target fusing
temperature from 175°C to 185°C. When the by-pass tray is selected, the machine
detects that the paper is thick. This setting can be changed with SP5-952.

Pre-heat Mode (Fusing Idling)

When the machine is powered on, or the front or right door is closed, the hot roller
turns for 6 seconds.
If the SP1-103 setting is 1 (Yes), when the fusing thermistor detects a temperature
lower than 100°C, the hot roller turns for 30 seconds (instead of for just 10 s) after
the machine is powered on, or the right door is closed. This maintains conditions
for fusing copies made on thick paper during cold weather conditions.

To Prevent Offset when Making Multiple Copies on Small-width Paper

This prevents the temperature at the ends of the hot roller from being higher than
at the center.
If the smallest copy paper width detected during a 40 seconds interval is less than
220 mm, the machine lowers the target fusing temperature by 10°C.
Then, during the next 80 seconds, if the smallest width detected is less than 220
mm again, the machine lowers the target temperature by another 5°C.

Reduced Copy Speed with Narrow Paper

To ensure that images are properly fused onto paper 220 mm or less in width, the
machine automatically reduces the copy speed under the following conditions:
• After 180 seconds of continuous copying
• When Thick or Special paper mode is used
• Paper is fed from the by-pass tray
Paper Size
8 " x 11" SEF (216 x 279)
1/2
8 " x 13" (216 x 356)
1/2
A4 SEF (210 x 297)
A5 LEF (210 x 148)
B5 SEF (182 x 257)
A5 SEF (148 x 210)
5 " x 8 " SEF (140 x 216)
1/2 1/2
A6 SEF (105 x 148)
Copy speed is measured in copies/minute.
IMAGE FUSING AND PAPER EXIT
Copy Speed Copy Speed
Until 180 s From 180 s
14
12
14
20.5
16
18
18
18
6-65
9.3
8.4
9.3
11.9
10.2
11
11
11